If your lady doesn’t want to swallow, it doesn’t matter how hostile or how chill or good-humored her reaction is to your love gravy. She is rejecting you!
If this wasn't purposely faked, she's not very experienced as 99% of the time his penis would twitch as he ejaculates. She should've felt that while she was throating him. Her response tells me she liked it and was play acting the innocent victim, which is fine if two agree.